Door-lock.



G. H. JOHNSON.

DOOR LOCK.

APPLICATION FILED SEPT. 5, 1914.

1,165,102. Patented Dec.21,1915.

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GEORGE H. JOI-I1 TSON, F ROCKFORD, ILLINOIS.

DOOR-LOCK.

Specification of Letters Patent.

Patented Dec. 21, 1915.

Application filed September 5, 1914. Serial No. 860,397.

To all whom it may concern Be itknown that I, GEORGE H. J oHNsoN;

a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have'invented certain new and useful Improvements in Door-Locks, of which the following is a specification.

An'object of my invention is to provide a door lock of the spring latch'typewhich has the parts thereof so arranged that the turning of the knob spindle to release the latch from its engaged position is precluded except a key of a special form and design be used to release mechanisms which become active to lock the bolt against movement to thereleased position.

A further object is to so construct the lock that the keyway is through the spindle of the knob and thus the key and knob are so located as to permit thetwo to be operated simultaneously or coincidentally.

Withother objects in view, which will be referred to, my invention consists in the peculiar combination and novel arrangement of parts, such as will be hereinafter more fully described in connection with the accompanying drawings and more particularly pointed out in the appended claims.

' In the "drawings:Figure 1 is a view in side elevation of my improved lock. Fig. 2 is a viewsimilar to Fig. "1 with the side plates of the case of the lock removed and with parts illustrated in section. Fig. 3 is a transverse vertical sectional View on the line-33 of Fig. 1. Fig. 4 is a detail perspective view of a form of key which may be adapted for use with my invention. Fig. 5 is a fragmentary sectional view taken'on the line 55 of Fig.6. Fig. 6 is a horizontal fragmentary sectional view taken on the line 66ofFig.5." J i The case of the lock comprises the body portion 1 and the cover plate 2 which is to be secured to the body portion by the screws 3 or other suitable fastening means and a bearing partition 4 is provided within the body member 1 to extend parallel withrthe ends thereof. A bolt5 is slidably mounted in orifices formed in alinement through the end wall 6 of the body member and through the partition 4 disposed therein and a coil spring 7 is received around this look bolt 5 to bear against the partition dand against an abutment pin 8 which is passed through the bolt 5 and which with the parts in the locked relation rests against the inner wall of the end 6 to prevent too great extension of the bolt 5 and to be maintained in a relation to be readily operable. The knob spindle 9 which is made tubular in form is passed through bearings provided through the side plates of the body member 1 and through the cover plate 2,

this spindle 9 being preferably mounted to trated in Fig. 2' and links 14: are connected from each of the eyelet loops of the yoke 12 to the arms 13 in such a manner that the turning of the knob spindle 9 through the grasping and turning of the knob 15 will cause a tension to be exerted upon one of the links 14 to draw the bolt 5 within the casing against the tension of the spring 7 and to release this bolt from its operative engagement.

With the parts in the relation as above described, all that-is necessary to draw the bolt from its operative relation is the turning of the knob 15, however, it is desirable that some means to preclude turning the knob and consequently of the spindle 9 be provided. To this end, the bolt 5 has the bracket arm 16 carried on theinner end arm 16 to prevent movement of the bolt in a direction to withdraw this bolt from its operative relation. the free and unengaged end of the lever 17 being sufiiciently heavy that this lever will be swung to the position as hereinbefore' set forth and the pins 19 being provided to prevent too great movement of the lever in either direction.

The spindle 9 is slotted transversely at 20. as is better illustrated in Figs. 5 and 6 and the upper arm of the lever 17 is bent to a shape to rest within the cut-away portion. A key-check 21 preferably made of spring sheet metal is secured to the case body 1 to extend into the slot 20 of the spindle 9 and this key-check member 21 is bifurcated at 25 adjacent'th'e notch'or slot 20 andjit may be its upper end adjacent the disposition of the arms of the lever 17 which is embraced by the slot 20.

Akey 22 has the bore of the spindle 9 and at its inner end this key is shaped as at 23 to engage agam'st the key check member 21 so that the arm provided by the bifurcation will rest within the notches 24' of the key andfas the key is inserted inthe bore of-the spindle 9 and is turned this engagement with the check member 21 and with the arm of the lever 17 relation. I v a V will be seen that I i will be suflicient to move the parts to the relation indicated in dotted lines in "Fig. where the arm of the lever 17 engaged with the bracket arm 16 will be swung to a position to permit back movement of this bracket arm and will consequently allow turning of the knob leand through the interconnection of the parts the withdrawal of the bolt 5 from its operative or locked position. It will .be' understood that'the spindle '9 mustbe kept free and have the passage thereof unobstructed to a point found desirable to passthe pin entirely through this knob' to form an abutment bearing for the key and to insure'that the key when inserted in the bore of the spindle will be brought to "the proper operating From the foregoing it haveprovided a door lock which has the parts thereof so constructed and arranged that the normal tendency of the mechanism is to hold the bolt in a locked relation and "turning of the knob to withdrawrthe bolt fromthis relation is prevented under ordi nary circumstances and is permitted only by the'insertion' of akev and turning of this key in conjunction with the knob. I

' While I have herein shown and described one specific form of my inventiom-it will be understood that slight changes might be made "in the form and arrangement of the several parts without departing from the spirit and scope of my invention, and hence I'do not Wish to be limited thereto except 'forsuch limitations as the claims may import.

'I claim i I 1. A door lockcomprising a locking'bolt, a spring connected Withsaid locking bolt to normally hold the bolt'in a locked relato have one of the armsthereof swing to a position behind said bracket arm'to prevent V Withdrawal of the bolta-gainst the tension slot therein mounted at a" point to have the free arm of' the lever received within the slot, and a key to be received through the V hollow-spindle to displace said free arm to shank thereof made tubular and of a diameter to fit within the move the lever from engagement behind the bracket arm and to thus permit withdrawal of the bolt from the locked position.

2; door lock comprising a locking bolt, a sprlng connected with said locking bolt to normally hold the bolt in a locked relation, abracket arm carried by' said bolt, a lever pivotally mounted.;,adjacent its center to have one of the arms thereof swing to a 7 position behind said bracket arm to prevent Withdrawal of the bolt against'the tension of the spring, a, hollow spindle provided with a slot therein and mountedat apoint to have the free arm of thelever received therein, ake'y to be received through the hollow spindle to displace said free arm to move the lever from engagement behind the bracket arm and to thus permit withdrawal of-theb'olt from thelocked position, and a key-check projectingrintoathe slot of said i hollow spindle to permit turningathereof and to preclude. the entrance offan unau-.

thorizedkey. I V

3. A doorlock-comprising a locking bolt,

a spring connected-with: said locking bolt to normally hold thebolt-in a locked relation, a -bracket arm carried by said bolt, a

lever pivotally mounted adjacentitsjcenter to'have one Ofthe'arms'theIfeOf swing .to a position behind said'bracket arm toprevent withdrawal of the bolt against-the tension of the spring and said, lever arranged to.

automatically swing to an operative relation upon movement of the bolt tothe locked position, a hollow spindle provided With a slot therethrough arranged at a position to have thefree arm of said lever located withinv the slot, a yoke carried by said hollow v spindle, a connection from eachend of said yoke to the bolt, and a key tobeinserted within the hollow spindle and engaged with tion, a hollow spindle mounted through the case and provided with a-slottherein, a yoke carried by said hollowspindle, a second yoke carried by the inner end ofsaid bolt,

link 1 connections between said yokes are 'ra nged'in a manner that upon turning of the spindle in the one direction or the other the bolt is withdrawn against the tensionv of the spring, a bracket arm carried by'the inner end of said bolt adjacent the disposit'ion of the yokethereon,: a leverpivotally 'siliently" hold Qsaid bolt in a thrown, posi:

mounted adjacent its center to have one of the arms thereof received behind said bracket arm and the remaining arm received within the slot of the hollow spindle, a key to be inserted through said hollow spindle to engage with the arm of the lever 1 received within the slot to turn the same about its pivotal mounting and to engage the lever from the bracket arm, and stop means carried by the key to project withinthe bore of the hollow spindle through said slot and thus prevent the use of an unauthorized key.

5. A door lock comprising a body, a locking bolt mounted therein to be capable of endwise sliding movement, a spring to nornially hold said bolt extended from the case in a locked relation, a hollow spindle mountedin the case and provided with a slot therethrough, means connected between said bolt and spindle in such relation that upon turning of the spindle the bolt is withdrawn against the tension of the spring, a bracket arm carried by'the bolt, a lever pivoted to have one arm thereof swing to a position behind said bracket arm and to hold the bolt against withdrawal and said lever arranged to automatically swing to an operative relation upon movement of the bolt to the locked position, a key to be inserted through the hollow spindle to engage with said lever and swing the lever from the position of abutment against the bracket arm, and said parts so arranged that as the lever is swung the tension'of the spring.

6. A door lock comprising a case, a bolt slidably'mounted in said case, a coil spring received around said bolt to hold the bolt normally extended from the case and in a locked position, a hollow spindle mounted through the case having a slot formed therethrough in that portion embraced within the case, means connected between said spindle and bolt in such relation that turning of the spindle causes the bolt to be withdrawn from its extended position against the tension of the spring, a bracket arm carried by said bolt, a lever pivoted to the case to swing to a position to engage behind said bracket arm and prevent withdrawal of the bolt and having a portion thereof extended to a point within the slot of the spindle, a key to be inserted through the hollow spindle to engage with said lever to swing the lever from its position of abutment against the bracket arm, and a key check to prevent'the use of an unauthorized key. t

In testimony whereof I aflix my signature P. BARRETT, MILDRED HUMESTON.

' Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

-Washington, D. G. 

